Abstract— The objective of this project was to use seismic refraction techniques to delineate the subsurface layers as a supplement to routine geotechnical investigations. Seismic velocities of the subsurface material were determined and used to find the possible composition of the subsurface materials and also to delineate the subsurface layers and their thicknesses. The seismic data was obtained using Geometric SmartSeis ST® 12-channel signal enhancement seismograph and Mark Product Limited® 48-Hz geophones. The survey was conducted along four traverse lines each with a length of 135m. It was determined from the seismic survey that the project site maybe underlain by dry loose sand, saturated sand and/or clay material. Information from two exploratory boreholes drilled to a maximum depth of 10.45m at the study area was consistent with the seismic refraction results obtained. The seismic results also showed there could be a fault at the project area along Traverse Line 1 and Traverse Line 2.

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